195618613 has 2 divisors, whose sum is σ = 195618614. Its totient is φ = 195618612.

The previous prime is 195618583. The next prime is 195618617. The reversal of 195618613 is 316816591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183277444 + 12341169 = 13538^2 + 3513^2 .

It is a cyclic number.

It is not a de Polignac number, because 195618613 - 2⁵ = 195618581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195618617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97809306 + 97809307.

It is an arithmetic number, because the mean of its divisors is an integer number (97809307).

Almost surely, 2^195618613 is an apocalyptic number.

It is an amenable number.

195618613 is a deficient number, since it is larger than the sum of its proper divisors (1).

195618613 is an equidigital number, since it uses as much as digits as its factorization.

195618613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 195618613 is about 13986.3724031644. The cubic root of 195618613 is about 580.5015607945.

The spelling of 195618613 in words is "one hundred ninety-five million, six hundred eighteen thousand, six hundred thirteen".